my $song = q{xecutioners-you_cant_scratch_(skit)};

# Split up artist and title of song
my ($artist, $title) = split(/-/, $song, 2);

# Turn the artist and title into human text, then stick
# them back together with ' - '.
my $new_song = humanize_text($artist) . ' - ' . humanize_text($title);

print $new_song, "\n";

# Runs a piping operation. From back to front, here's what
# happens:
#   1. We split 'something_like(this)' into 'something',
#      'like', 'this'
#   2. We capitalize the first letter of every word
#   3. We stick the list back together delimited with spaces
sub humanize_text {
    return join(' ', map(ucfirst($_), split(/[^a-zA-Z]+/, $_[0])) );
}